package com.cskaoyan.service;

import com.cskaoyan.mapper.AccountMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author stone
 * @date 2022/03/31 20:48
 */
@Service
public class AccountServiceImpl implements AccountService{

    @Autowired
    AccountMapper accountMapper;

    @Override
    public void transfer(Integer fromId, Integer destId, double money) {
        double fromMoney = accountMapper.selectMoneyById(fromId) - money;
        double destMoney = accountMapper.selectMoneyById(destId) + money;

        accountMapper.updateMoneyById(fromId, fromMoney);//提交事务
        int i = 1 / 0; //发生异常
        accountMapper.updateMoneyById(destId, destMoney);//执行不到了

    }
}
